1.4

5: Any number (besides zero) to the power of zero is 1.

7: You can make the exponent positive by putting it in the denominator.

15: Only the factor with the negative exponent will move to the denominator.

20: Each factor has a negative exponent, so each factor will move in order to make its exponent positive.

27: This is p⁶ × p⁶ × p⁶ × p⁶.

31: x means x¹

32: Add exponents to multiply, and subtract them to divide.

37: -5 to the third power is -125.

38: You can start by putting (4x) in the denominator with a positive exponent.

39: The numerator and denominator each have a negative exponent, so they both move (that is, the whole fraction gets flipped).

40: Negative times negative is positive.

70: The √ symbol means the positive square root.

72: Take the square root of the numerator and the square root of the denominator.